A Missing Rule

Hello my little brother (11 years old) uses my minecraft account, but he and a friend of his thought it would be funny to team kill which resulted in my account being banned which is annoying my question is simple, could you unban my account (I don't know how to prove that it in fact was my little brother I guess you have to take my word for it)

so because I want to be unbanned I took a look at the rules and noticed that there is no rule for team killing and no punishment being mentioned on your website. I hope you can unban be.
I am hopping that telling you about this (bug (because I believe it should be stated in your rules section)) you can unban me.